/*公共样式部分*/
* {
    padding: 0;
    margin: 0;
}

html,
body {
    width: 100%;
    height: 100%;
}
/*容器样式*/
.my-container {
    background-image: url(../img/bg.jpg);
    background-position: center;
    background-size: cover;
    height: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
    overflow: hidden;
}